title: Laser-induced fluorescence of uranyl complexes in aqueous solutions: the role of diffusion-controlled excited states annihilation.
abstract: We present the analysis of diffusion-controlled annihilation of excited U(VI) complexes in aqueous media that leads to appearance of rapid non-exponential fluorescence decay. We show that under typical experimental conditions the impact of annihilation processes can't be neglected when determining U(VI) complexes fluorescence lifetimes: at excitation intensities between 10(6) W/cm(2) and 10(8) W/cm(2), the rate of excited states deactivation increases, and then an opposite trend is observed. The latter can be interpreted as the consequence of optical breakdown in water.
authors.forename: Gleb
authors.initials: G
authors.lastname: Budylin
authors.forename: Evgeny
authors.initials: E
authors.lastname: Shirshin
authors.forename: Victor
authors.initials: V
authors.lastname: Fadeev
authors.forename: Vladimir
authors.initials: V
authors.lastname: Petrov
authors.forename: Stepan
authors.initials: S
authors.lastname: Kalmykov